The article talks about how global warming is happening due to human activities emitting greenhouse gases (GHGs). To fix this issue, different ways to reduce these gases were suggested, but there are potential environmental impacts. Changes in energy technology may bring good and bad effects. Some examples include changes in the air we breathe, alterations in water quality and quantity, more mining for coal and metals, and impacts on ecosystems from using biofuels and renewable energy. The article doesn't give exact numbers for these impacts but explains the possible consequences.