In this lesson, we discussed the environmental challenges that the United States and Canada face. Both countries are seeking solutions to issues such as pollution and resource conservation. As a government leader, which issue would you
focus on most? Choose one of the issues discussed in this lesson, and write a short paragraph explaining the steps you
would take to solve that issue in the United States.

question

which are human systems?

the amazon rain forest

the appalachian trail

the george washington bridge

the himalayas

the hoover dam

the north american free trade agreement

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.

f.without carbon-14, james can use relative dating to estimate the age of the fossil.

your answer is 20. hope this !