Be able to explain the environmental impacts of moving towards green technology and abandoning older technology.
HELP I HAVE A TEST SOON

Changing usage from non environmentally safe products to green tech will help bring down global warming and greenhouse gasses. If we were to use green tech we could save the world from dying of global warming and acid rain. Using non fuel-efficient cars and using factories causes environmental damage, destroying the planet.

Hope it helps! (:

answer; ///(b) it is composed of four protein chains and four heme groups;

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.