The removal of trees can cause soil ________.
reaction
solution
collection
erosion
Heavy rain for several days led to severe ________ in the area.
flooding
clouding
storm
melting
Air pollution is a ________ problem in many large cities.
serious
quiet
easy
simple
Bananas and pineapples grow best in ________ climates.
tropical
windy
arctic
dry
Plants help to ________ carbon dioxide from the atmosphere.
absorb
release
remove
avoid
The festival is held ________ in July.
rarely
annually
quickly
monthly
Car ________ contribute to global warming.
emissions
commissions
conditions
permissions
The forest is home to great ________, including rare birds and insects.
diversity
chemistry
biology
biodiversity
You should wear a helmet when riding a bike; ________ you might get injured.
however
so
otherwise
but
Large areas of forest have been cleared to grow ________ for products.
grapes
palm oil
corn
wheat