The amount of carbon dioxide released into the atmostphere
carbon footprint
a gas or other subtance which is sent out to the air, generated by factories and vehicles
emission
what disaster is this
drought
a chemical substance that is spread on the land or given to plants, to make plants grow well:
chemical fertilizers
ecological balancea stable ecosystem in which a large number of species live together
ecological balance
the cutting down of trees in a large area, or the destruction of forests by people
deforestation
what disaster is this?
flood
what are they called?
catastrophic natural disasters
An illness that can be passed through the air, from one person to another
infectious diseases
the lack of sufficient water resources
water shortage
when a lot of people do not have ebough food and many die
famine
An increase in the average temperature of the Earth's atmostphere
cimate change
poor health resulting from extreme heat
heat-related illness
A long term change in the Earth's weather
global warming
A gas that traps heat above the earth
greenhouse gas