1.) tends to raise co2 levels in the atmosphere, but 2.) tends to lower co2 levels in the atmosphere. 1. a.) carpooling instead of driving alone b.) cutting down trees instead of growing trees c.) reusing an item instead of buying new d.) using energy-efficient cars instead of gas guzzlers 2. a.) driving instead of walking b.) releasing emission instead of storing them c.) throwing food in the trash instead of composting d.) using clean energy sources instead of fossil fuels

Therefore , 1 B) Cutting down trees instead of growing trees.

2 D) Using clean energy sources instead of fossil fuels.

Explanation:

We know that the cutting down of tree and more use of fossil fuels increase the carbon dioxide in atmosphere and we can overcome it by using clean energy sources instead of fossil fuels.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.