Chapter 28: Renewable Resources and Recycling

Site for the disposal of waste materials, leading to release of methane

________ is a renewable resource because there is such a large amount of it that humans will not use it all up.

________ is processed through fractional distillation and cracking to produce a wide variety of useful chemicals.

Less energy is needed for recycling compared with making a new product from ________, so the emission of greenhouse gases is reduced.

However, the ________ process enabled humans to produce fertilisers from nitrogen in the air, and has allowed synthetic fertilisers to be produced.

________ have allowed intensive farming to become widespread, which has meant that we can produce enough food to support the growing world population.

remove or take out

block of solid metal

places where refuse is buried underground

responsible for global warming

mixtures of hydrocarbons

capacity of a system

minerals that have been made through the formation of the world

Surroundings where people live

reusing or reprocessing material

_____short supply