saving our environment

which gas in the atmosphere protect us from harmful ultraviolet rays

• nitrogeb

• carbon dioxide

• ozone

• oxygen

which one of the following materials you think is least environmental friendly

• paper

• plastic

• cloth

• trees

what acording to you is not done by plants ?

• causing flood

• causing rains

• preventing soil erosion

• giving us shelter

which of this fuels does not cause pollution ?

• petrol

• diesel

• CNG

green living is one way to save the ----------------

• people

• man

• air

• environment

many careless activities of human beings have a ---------- efect

• negative

• positive

• nice

• bad