to take part in a planned series of activities in order to make sth happen or to prevent sth
campaign
15
to be a member of a group or an organization
belong to sth
15
a person who takes part in a planned series of activities in order to make sth happen or to prevent sth
campaigner
15
to be worried about or interested in sth
care about sth
15
a person who is employed by a charity
charity worker
15
changes in the earth's weather, including changes in temperature, wind patterns and rainfall, especially the increase in the temperature of the earth's atmosphere that is caused by the increase of particular gases, especially carbon dioxide
climate change
15
a person or an organization that competes against others
competitor
15
to add a substance which will make sth dirty or harmful
contaminate
15
cutting down trees over a large area
deforestation
15
to destroy sth or damage it badly
devastate
15
an illness of the body in humansm animals or plants