How is technology is used to increase agricultural yields?

Lots of ways

Explanation:

Technology has helped to evolve agriculture throughout history. One example is, years ago horses and oxen were used to help plow fields whereas now we have tractors to make that job easier. Basically agriculturists are able to use less energy and fewer resources to complete a larger job.

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.