a long journey, especially by sea or in space

all the people who live in a particular area, country, etc. when talked about as a group

lectricity or power that is produced from the sun, wind, water, etc. in ways that do not use up the earth's natural resources or harm the environment

the state of being crowded and full of traffic

gas, etc. that is sent out into the air

to say or do something that makes somebody stop what they are saying or doing

everything you can see when you look across a large area of land, especially in the country

to keep a particular quality, feature, etc.; to make sure that something is kept

1. to use something, especially fuel, energy or time / 2. to eat or drink something