Bracket creep is the gradual movement into higher tax brackets when incomes increase as a result of inflation.

The Rio Declaration on Environment and Development is a series of principles defining the rights and responsibilities of states with regard to sustainable development.

Stagflation occurs when high inflation and low, no, or negative economic growth are combined. During stagflation unemployment is high and welfare decreases.

Stock pollutants are pollutants that accumulate over years in water and on land. They cause serious environmental problems.

Hyperinflation occurs when the rate of inflation is very high - over 50% per month. Hyperinflation is also called runaway inflation or galloping inflation.

Tourism benefits the country by improving the economy. It does this through job creation, the development of infrastructure, increased entrepreneurship, better conservation, more foreign exchange, GDP growth, improved welfare, reduced poverty and increased government revenue.

Ecotourism is responsible travel that conserves and sustains the environment and the welfare of local people.

Sustainable development ensures that the use of environmental resources today does not damage prospects for use by future generations.

Demand-pull inflation occurs when the demand for goods and services exceeds the supply. This results in an increase in the prices of goods and services. The increased demand 'pulls up' the prices.