I occasionally purchase organic and free-range produce. Many environmental problems are exaggerated. The Montreal protocol was an international agreement to curb the trade in endangered species. I usually send greetings cards made from recycled paper. The price of products should reflect as far as possible the costs of their environmental impact.
Eutrophication is one process used to treat polluted water for human consumption.
When I next vote, my choice will be influenced by the stance and track record of the candidates on environmental issues. Protecting jobs is more important than protecting the environment. Plutonium is a mineral mined to make fuel for nuclear reactors. I try to avoid as much as possible the purchase of products that run on batteries. I am not concerned by the statement that 'every day, possibly some 50 species of plants and animals become extinct'.