Water pollution
waste, chemicals, or other particles cause a body of water (i.e. rivers, oceans, lakes) to become harmful to the fish and animals that need the water to survive.
Pesticides
substances we use to control or kill pests like weeds, insects, rodents, or bacteria — anything we don't want to have around. Sometimes these will work too well, harming the intended pest as well as other plants, animals, and even people.
Glaciers
huge,thick masses of ice which form when lots of snow falls in one location for many years . This compressed snow becomes ice
Greenhouse Effect
a process that occurs when gasses in Earth's atmosphere trap the Sun's heat.
Global Warming
a process that causes the Earth to become hotter . These activities such as driving cars, using fossil fuels, working in factories and agriculture, cause an increase in the gasses that keep the Earth warm
Sea level
a term used to describe the usual height of the ocean
Deforestation
when forests are converted for other purposes by cutting down the trees to clear the land for other use.
Ice sheets
a large mass of glacier ice that covers an area of more than 50,000 square kilometers (19,000 sq mi).
Icebergs
are chunks of ice that break off of glaciers and fall into the ocean
Land Ice
Ice that originates on land; examples include icebergs, glaciers, ice sheets, and ice shelves
Sea Ice
frozen ocean water which forms, grows, and melts in the ocean