HUMAN IMPACT on the BIOSPHERE Chapter 6-2 Renewable and Non-renewable Resources

Go to Section: 6–2Renewable and Nonrenewable Resources A.Classifying Resources B.Sustainable Development C.Land Resources D.Forest Resources E.Fishery Resources 1.Overfishing 2.Sustainable Development 3.Aquaculture F.Air Resources G.Freshwater Resources Section 6-2 Section Outline

can ______________ if they are alive OR can be replenished by __________________________ if they are non-living regenerate biogeochemical cycles RENEWABLE RESOURCES

“Renewable” depends on context Ex: An _________tree can be re-grown, but a __________ of trees in an ecosystem may NOT be replaceable RENEWABLE RESOURCES individual population

“Renewable” depends on context Ex: “_____________” forests provide a unique _______ and are home to many species that don’t live in other types of forests RENEWABLE RESOURCES Old growth habitat

Renewable does NOT mean __________________ Ex: ______________ is a renewable resource but can become limited by drought or overuse unlimited Fresh water NONRENEWABLE RESOURCES

can ___________________________ by natural processes NOT BE replenished NONRENEWABLE RESOURCES

___________________ can affect the quality and supply of renewable resources such as _______________________________ How can we provide for our needs while maintaining ecosystem goods and services that are renewable? land, forests, fisheries, air, and fresh water THE BIG QUESTION ? HUMAN ACTIVITIES

= ____________________________ It’s a way of _________ natural resources __________________ them and providing for human needs WITHOUT causing long term __________________ SUSTAINABLE DEVELOPMENT One ANSWER to ? using without depleting environmental harm

A __________________ is anything an organism needs for life RESOURCE REMEMBER NATURAL RESOURCES = LAND AIRFORESTSWATER

Provide _________ for human communities Provide _____________ for industry LAND RESOURCES space raw materials

LAND RESOURCES Land resources include __________ which is a ______________ resource if managed properly. ____________is made of sand, clay, rock, and _________(decayed organisms) and is produced and maintained by interactions between soil and plants growing in it. SOIL renewable humus TOPSOIL

LAND RESOURCES Wearing away of topsoil = ____________ is caused by plowing land and removing plant roots Soil erosion

LAND RESOURCES ___________________ = changing of fertile land in dry climates into desert areas caused by farming, overgrazing, and drought Desertification

Cover Crops Legumes, grasses, and other cover crops recycle soil nutrients, reduce fertilizer need, and prevent weed growth. Controlled Grazing By managing graze periods and herd densities, farmers can improve nutrient cycling, increase the effectiveness of precipitation, and increase the carrying capacity of pastures. Biological Pest Control The use of predators and parasites to control destructive insects minimizes pesticide use as well as crop damage Contour Plowing Contour plowing reduces soil erosion from land runoff. On hilly areas, plowing is done across the hill rather than straight up and down. Crop Rotation Different crops use and replenish different nutrients. By rotating crops, the loss of important plant nutrients is decreased. ABC Yr. 1 Yr. 2 Yr. 3 Section 6-4 corn alfalfa oats alfalfa (plowed in) Sustainable Agriculture

Provide _________ for products ranging from homes to paper Wood provides _________ in many countries FOREST RESOURCES wood fuel

Forests have been called the “lungs of the Earth” because they remove ________________ and produce ______________ FOREST RESOURCES carbon dioxide oxygen

Forests also: ________________ FOREST RESOURCES store nutrients provide habitats moderate climate prevent soil erosion protect fresh water

“Renewable” depends on context Many forests in USA have been logged at least once and have grown back naturally. _______________ forests have never been cut. It takes centuries to replace these and species may be lost. OLD GROWTH

FOREST RESOURCES Loss of forests = ____________ can result in erosion and loss of nutrients preventing regrowth deforestation

HOW DO WE HELP? Sustainable development: selective harvest of mature trees replanting of logged areas tree farms breeding new, faster growing species

______________ = harmful material that can enter the biosphere through land, air, or water _________ = Mixture of chemicals that appear as a gray-brown haze in the atmosphere AIR RESOURCES Pollutant smog

Burning __________ releases pollutants that cause smog and other problems in atmosphere. Toxic chemicals like nitrates, sulfates, and particulates can cause ________________ like ___________ AIR RESOURCES fossil fuels breathing problems asthma

Smokestack “Scrubbers” control emissions Auto emission standards Clean air regulations Reduce use of fossil fuels SUSTAINABLE DEVELOPMENT

Americans use BILLIONS of gallons of freshwater daily for ________, ________ and ___________________ FRESH WATER RESOURCES drinkingwashing watering crops

Although water is a ______________ resource, the total supply of fresh water is __________. FRESH WATER RESOURCES limited renewable

Wetlands _____________________ and ________ water passing through. FRESH WATER RESOURCES purify remove pollutants

Water conservation Protect wetlands and forests Water treatment plants Clean water regulations SUSTAINABLE DEVELOPMENT hhttp://

WAYS TO CONSERVE WATER

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POWER POINT BY K. RIEDELL ADAPTED TO MISSISSIPPI STATE SCIENCE FRAMEWORK