Environmental scientists study ways society can use up natural resources and are not concerned with preserving them for the future.

burning of wood and coal

explanation:

the panel also concluded there's a better than 95 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in earth's temperatures over the past 50 years.

every el niño cycle is different. every year.

the scientific method.