Climate Change Solution Images

URL: https://www.climatevisuals.org/images?f%5B0%5D=theme%3ASolutions&id=1197
Location: Dhaka, Bangladesh
Date:not found

Description: There’re two people in the image that trying to recycle a big pile of shoes by collecting them and selling them to the industries who would like to source the materials of shoes and then process them into raw materials that they then sell.

Assessment from me: I think it’s pretty effective a way to reduce our waste shoes. We just did a project called “precycling” for the last few weeks, and I learned that it’s necessary to recycle clothes and everything else that’s recyclable after using them for once because the landfill is too few for us to put all our garbages there.
Comparing with Canada where export most of the recyclable waste to other countries, people in Bangladesh should feel lucky to have some industries who want to recycle the produces for them.

URL: https://www.climatevisuals.org/images?f%5B0%5D=theme%3ASolutions&id=1080
Location:peru, Cusco
Date: 2014
Description: People are building with “low CO2 bricks” in Peru. It’s a method to reduce the emissions of CO2 by using electrically powered ventilation. They store bricks for some days before loading them into the kiln.

Assessment: I don’t think it would help to reduce the emissions of CO2 a lot because it’s not a very scientific method that’s been proved by experts. They seem to use physical method only so it’s not very persuasive to me.

How can BC’s waste management system be made more sustainable?

BC’s waste management syetem is not as efficient as we thought it was, there’re still improvement we need to make in order to make the system more sustainable. Let’s first take a look of how some other parts of the world deal with their garbages:

As the world’s largest trash generator, China is still finding a way to deal with its own garbage while a big amount of garbage ending up becoming landfills and flowing down the river. This is a drawback of China about how to deal with the waste, however, it has the world’s largest e-commerce market, consisting of 42% of global transactions, and the largest mobile payment market, These two pole positions make China the best place in the world to innovate digital solutions for waste. Therefore, a lot of developed countries send their digital waste China, this can also be a solution to BC’s digital waste.

Also, some Chinese restaurants are using a U.K. technology system called Winnow”, to save the food waste from the kitchen chefs, how it works is that the kitchen staff are trained to log the food they are throwing away, which is then automatically weighed by the trash bin. The technology analyzes the value of what is dumped, in both economic and environmental terms, and provides analytics reports to help the kitchen run more efficiently. Globally, Winnow’s system has helped to save one meal from the bin every two seconds, since starting in 2013. it can probably be an efficient solution for BC’s food waste.

Rather than using other kinds of plastic, Japanese people use a plastic called “PET” resin, which is a reusable material, instead. What Japan does with its domestic PET resin waste is that they crush the collections into flakes then pelletize them so that they can get fiber out of those resin wastes to create spun yarns. A lot of recycled uniforms are made through this process and it reduces the plastic wastes efficiently. So why don’t we use this kind of plastic and try to recreate uniforms and clothes out of them? If companies in BC utilizes the technology of recycling this type of plastic, we don’t even need to send our own plastic waste to other developing countries, where all the plastic waste ended up piling up somewhere unknown.

Generally speaking, Canada doesn’t seem to have a complete circular economy system; when it comes to deal with various types of wastes, the most common thing Canadian government chooses to do is to transfer them to some other countries instead of fully reuse and recycle the recycable waste. Since the biggest reason why the companies in BC would not like to create more useful things from recycling our wastes is the few benifits they could get from doing so, the government should introduce policies to encourage more companies to regenerate our waste effectively except for landfilling and reducing the amount of useing the unrecycle wastes; and at the same time, companies that are in cahrge of dealing with wastes in BC should learn more efficient technologies to recycle and manage our wastes from other countries that have more advaced technologies.

How sustainable are different kinds of Aquaculture?

Aquaculture is a human activity of rearing, breeding, and harvesting of aquatic species, including both animals and plants, in controlled aquatic environments like the oceans, lakes, rivers, ponds, and streams. It serves different purposes including food production, the building of aquariums, and fish cultures and habitat restoration. Aquaculture plays an important role in our daily life, but is it as sustainable as we think?

There are different types of aquaculture in general, mariculture is one of them. All the aquaculture that involves the use of seawater is a part of mariculture. The organisms bred in the seawater ranges from mollusks to seafood options like prawn and other shellfish, and even seaweed. I found a picture of how it works on Wikipedia:

We can see from the instruction of each part of the mariculture process that there are many risks in a basic mariculture system. For example, the fish sewage is so strongly gathered in one certain area that the diseases and pathogens may be transmitted through this process; and the seed stock also lay eggs with new diseases and parasites that might affect the other species and even the ecosystem. Overall, the mariculture is not very sustainable due to the waste from the cage cultures and the feeding material we use.

Another kind of aquaculture is called fish farming. It’s pretty similar to the mariculture because of the same method of keeping and controlling stock in some certain areas with pens or cages, while fish farming also include farming in fresh water or in ponds. A lot of people use this method to culture aquatic species in order to export them and get the most benefits. But as we see in the video of how salmon farming spreads the diseases and viruses from Norway to Canada coastal areas and causes a big amount of dying salmons, this is obviously not good for the sustainability of ecosystem around the culture areas. I think a way to solve this problem could be that the government can make some new policies of giving the sales more benefits by selling the fish in his own area. It can reduce the risk of transmitting diseases.

Algaculture is a type of aquaculture involving the cultivation of algae. It takes some chemical methods to harvest the algae which is a kind of photosynthesis microbial organism and it may be a finacial issue; however, it doesn’t have any disease spreading issue. Algae are the natural source of vital protein and Omega-3s; they can grow in brackish water without using fertile land. Algaculture is transitioning the world to a new way of sustainable food production. Scientists are also trying to make algae fuel to generate energy. This kind of aquaculture seems cleaner and more sustainable than the two above.

And there are more different kinds of aquaculrure such as flow-through system, closed recirculating system, etc. Generally speaking, aquaculture can be sustainable if it’s carried on in a recycable and ecologically friendly way, which creates few pollutions or diseases and small impact to the ecosystem; but with the most popular breeding and harvesting method we use right now, which is fish farming, the aquaculture can not be sustainable due to the influence it has to the water and other wild species around the farming area.

What direction should BC Forestry Industry take?

I think it’s better to combine the practices like clearcutting with reserves, clearcutting, and selective logging together in order to continue BC’s forestry industry and also keep the sustainability of the silviculture system of BC at the same time.

Although that clearcutting is the most efficient and least expensive way of harvesting wood, it may create difficulties that impede the establishment of regeneration. The statistic showed that in 2015-2016, harvesting on public lands was by clearcutting with reserves occupied 85% of BC’s forests, clearcutting occupied 11%, and retention cutting occupied 3%; which is good to the forest conservation since the companies did reserve the area where they cut trees down. “The average size of clear-cuts has decreased, improving the balance of environmental and economic objectives.” quoted from Wikipedia. From the picture, we can see that clearcutting with reserves is more renewable a forestry practice than the only clearcutting.

Selective logging is a practice of removing one or two trees and leaving the rest intact. It is often considered a sustainable alternative to clear-cutting, in which a large swath of forest is cut down, leaving little behind except wood debris and a denuded landscape. In my opinion, selective logging seems to be the perfect way to maintain the sustainability of BC’s forestry. Because sometimes the forest fire is caused due to the trees are too closely growing near to each other, and the selective logging reduces the possibility of trees burning themselves efficiently.

A silviculture system is a sum of activities that including how trees are harvested, regenerated, and managed over time. Foresters choose a silvicultural system according to the ecological traits of the tree species, and by balancing the purposes of the landowners. The graph below tells us that it’s not a simple step to keep the silvicultural system work, we need to combine the clearcutting, particle cutting which is similar to selective cutting, and also clearcutting with reserves.

As we all know, a big part of BC’s economy depends on the forestry, and a big amount of people are working for the forestry industry.

From the chart above, we can see that the total amount of employment in BC forestry presented an increasing trend during the recent 3 years. And we also talked a lot about it in class that the forestry of BC is an important part of the economy. So the best way to develop the forestry and also to reduce the areas experiencing the deforestation is by combining different forestry practices together and that way we can reach a balance of the silviculture system in BC.