Choose the words from the box and fill in the gaps. valuable, petroleum extraction, renewable, coal, tax on consumption, raw materials, natural, forestry, fossil fuels, natural gas natural resources (economically referred to as land or are naturally forming substances that are considered their relatively unmodified ( form. thus, mining, fishing, hunting and are generally considered natural-resource industries. natural resources are mostly classified into and non-renewable resources. sometimes resources are classified as non-renewable even if they are technically renewable, just not easily renewed within a reasonable amount of time, such as some non-renewable resources can be renewable but take an extremely long time to renew. fossil fuels, for example, take millions of years to form and so are not practically considered 'renewable'. different non-renewable resources like oil, etc. have different levels of demand from different sectors like transportation and residences with each resource specializing for each sector. many environmentalists propose a of non renewable resources. non-renewable resources cannot be replaced or can only be replaced over thousands or millions of years.

Natural resources (economically referred to as land or raw materials) are naturally forming substances that are considered valuable in their relatively unmodified   natural form.
Thus, mining, petroleum extraction, fishing, hunting, and forestry are generally considered natural- resource industries.
Natural resources are mostly classified into renewable and non-renewable resources. Sometimes resources are classified as non-renewable even if they are technically renewable, just not easily renewed within a reasonable amount of time, such as fossil fuels.
Some non-renewable resources can be renewable but take an extremely long time to renew. Fossil fuels, for example, take millions of years to form and so are not practically considered 'renewable'. Different non-renewable resources like oil, coal, natural gas etc. have different levels of demand from different sectors like transportation and residences with each resource specializing for each sector.
Many environmentalists propose a tax on consumption of non renewable resources. 
Non-renewable resources cannot be replaced or can only be replaced over thousands or millions of years