Agricultural Revolution Agriculture is THE RAISING OF CROPS AND LIVESTOCK FOR FOOD OR FOR OTHER PRODUCTS THAT ARE USEFUL TO HUMANS Started over 10,000 years ago. The agricultural revolution allowed human populations to INCREASE RAPIDLY As populations grew, they began to concentrate in smaller areas placing increased pressure on the local environment

Many habitats were DESTROYED as grasslands, forests, and wetlands were replaced with farmland. The SLASH AND BURN TECHNIQUE was one of the earliest ways that land was converted to farmland. Plants that exhibited the qualities farmers desired, such as large kernels, were then planted and harvested again. Overtime, the domesticated plants became VERY DIFFERENT FROM THEIR WILD ANCESTORS Much of this converted land was POORLY FARMED and NO LONGER FERTILE.

Industrial Revolution The Industrial Revolution involved a _______________________such as _____________________to _____________________such as coal and oil. This increased use of fossil fuels changed ___________________ and greatly increased the efficiency of __________________,____________________ and ______________________. In factories, the large-scale production of goods became ___________________than the local production of handmade goods.

Agricultural PRODUCTIVITY increased, and sanitation, nutrition, and medical care vastly improved. Overall, it improved the Quality of Life tremendously. However, the Industrial Revolution also introduced many new ENVIRONMENTAL PROBLEMS such as POLLUTION and HABITAT LOSS …….dun dun

Population Growth The Industrial Revolution, modern medicine, and sanitation all allowed the human population to grow faster than it ever had before. Producing enough food for large populations has environmental consequences such as habitat destruction and pesticide pollution. The human population almost QUADRUPLED in the 20 th century. We can expect the pressure on the environment will continue to increase and the human population and its need for food and resources grow.

Do you think we will have enough resources to support our population in the future? 5 years? 10 years? years? Why?

What are our main environmental problems? 1. Resource Depletion: Renewable resource- A resource that can be replaced relatively quickly by natural processes Nonrenewable resource - A resource that forms at a slower rate than it is consumed Depleted- when a large fraction of a resource has been used 2. Pollution: Biodegradable pollutants – can be broken down by natural resources Non-biodegradable pollutants - cannot be broken down by natural resources 3. Loss of Biodiversity: Mass extinctions – a large scale extinction

Mr Handschuch: 5.9 Earths Mrs. Kreudl: 9.2 Earths

“Tragedy of the Commons” The commons, were the areas of land that belonged to the whole village. It was in the best interest of the individual to put as many animals in the commons as possible. However, if too many animals grazed on the commons, they destroyed the grass. Once the grass was destroyed, everyone suffered because no one could raise animals on the commons. The commons were eventually replaced by closed fields owned by individuals.

“Tragedy of the Commons”

Economics and the Environment The SUPPLY AND DEMANDis a law of economics that states as the demand for a good or service increases, THE VALUE FOR THE FOOD OR SERVICE also increases. A cost-benefit analysis balances the cost of the action against BENEFEIT one expects from it. Often, environmental regulations are passed on to the CONSUMER/ TAXPAYER. Risk assessment is a tool that helps us create cost effective ways to protect OUR HEALTH AND ENVIRONMENT. The public must be able to perceive the risk ACCURATELY.

Population and Consumption Almost all environmental problems can be traced back to two root causes: The human population in some areas is _______ too quickly for the ___________________to support. People are using up, ___________, or _____________ many natural resources faster than they can be renewed, replaced, or cleaned up.

Local Population Pressures When the population in an area grows __________, there may not be enough natural resources for the everyone to live a ______________________________ In these areas, ______________,_____________, and __________ can be constant threats. Food ______________, _____________, and job creation cannot keep pace with the __________________, so each person gets fewer resources as time goes by.

Consumption Trends Developed nations use about __________of the world’s resources, although they make up only ____________of the World’s population. This rate of consumption creates more ______________________ per person then in developing countries.

So what defines these types of Countries Developed highly developed economy advanced technological infrastructure Service provides more wealth than industry Developing a nation with a lower living standard Underdeveloped industrial base Industry provides majority of wealth

Ecological Footprints Ecological footprints are ____________ that show the productive area of Earth needed to ____________ one person in a particular country.

Environmental Science in Context Remember a few things as you explore environmental science further: First, be prepared to _________ to many ______________ over a particular issue. Second, _______________ the source of the information you encounter. Third, gather all the information you can before drawing a _______________. For these reasons and others you must use your _________________ when making decisions about environmental issues.

A Sustainable World ________________ is the condition in which human needs are met in such a way that a ___________________can survive indefinitely. A sustainable world is not_____________. It requires everyone’s participation including __________________, _______________, and ______________