| A | B |
|---|
| gradually | slowly, over a long period of time |
| predict | to say that something will happen, before it happens |
| depend on | directly affected or decided by that thing |
| threaten | to be likely to harm or destroy something |
| available | able to be used or obtained |
| source | a thing, place, activity etc that you get something from |
| go up | increase |
| technology | new machines, equipment, and ways of doing things that are based on modern knowledge about science and computers |
| demand | the need or desire that people have for particular goods and services |
| commercial | related to business and the buying and selling of goods and services |
| effect | the way in which an event, action, or person changes someone or something |
| cut down | cut and remove (as in to cut and remove a tree) |
| make up | think of a new story/idea |
| crucial | extremely important, because everything else depends on it |
| chronic | long-lasting |
| combine | to exist or work together |
| already | before now, or before a particular time |
| last | to continue for a particular length of time |
| figure out | find the answer |
| limit | to prevent an amount, number, etc from increasing beyond a particular point |
| natural resources | raw materials found in nature, such as trees, oil, and natural gas |
| standard of living | the overall quality of life that people experience |
| developed | economically strong |
| nonrenewable | types of energy such as coal or gas cannot be replaced after they have been used |
| hang up | end a telephone conversation |
