Question 1

in the middle

Accepted Answer

central

Question 2

found in nature and not made by humans

Accepted Answer

natural

Question 3

relating to the natural world

Accepted Answer

environmental

Question 4

to be right for a person or situation

Accepted Answer

suit

Question 5

appropriate for a particular purpose or occasion

Accepted Answer

suitable

Question 6

popular trend for a particular period of time

Accepted Answer

fashionable

Question 7

dependable , can be trusted to do what is asked

Accepted Answer

reliable

Question 8

make sth smaller or less

Accepted Answer

reduce

Question 9

look after sth

Accepted Answer

take care of

Question 10

take a long time

Accepted Answer

take ages

Question 11

not pay attention

Accepted Answer

take no notice

Question 12

many cars crowed together on the road

Accepted Answer

traffic jam

Question 13

type of animal or plant that may soon no longer exist

Accepted Answer

endangered species

Question 14

increase in the Earth's temperature caused by pollution or gas

Accepted Answer

global warming

Question 15

system of buses or trains

Accepted Answer

public transport

Question 16

power made by the heat and light of the sun

Accepted Answer

solar energy

Question 17

area of land where animals and plants are protected

Accepted Answer

nature reserve

Question 18

things that are no longer needed and not kept after use

Accepted Answer

waste

Question 19

worried

Accepted Answer

concerned

Question 20

important subject or problem that people are discussing

Accepted Answer

issue

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