Renewable Energy

The longest one syllable word is “screeched.”

What are renewable resources? They are resources that can be replaced at a rate about as fast as they are used up. Examples: oxygen, plants, soil and solar energy

Air - renewable resource (78% Nitrogen and 21% Oxygen)

Air Pollution: It occurs when some part of the environment is changed in a way that makes it unfit for humans, animals, and or plants.  Natural sources of air pollution: forest fires, dust from soil, and volcanic eruptions.

Photosynthesis: process where plants use light from the sun to convert carbon dioxide and water to sugars and oxygen.

Land and Soil 29% of earth’s surface is land but less than 25% of earth’s land can be used to grow crops. Soil Fertility: The ability of soil to grow plants.

There are 2 Problems that limit soil renewability: 1. Soil erosion: Breakdown of soil by wind and flowing water. 2. Soil depletion: when the soil loses its nutrients due to harvesting.

Water: Over 70% of earth’s surface is covered by water 97% of this water is found in the oceans which is too salty to drink or use for crops

 The supply of fresh water is constantly being recycled (Water Cycle) – a renewable resource.

There are two problems with water: 1. Quantity: amount of Rainfall is different all over the world. 2. Quality: Easily polluted

The main industry here in California is Agriculture even though the average rainfall for California is in. Therefore, most of the water So. California uses comes from No. California and the Sierra Nevada Mts. through the California Aqueduct. It provides water supplies for 25 million Californians and 750,000 acres of irrigated farmland.

Water Pollution  Sources of water pollution – industrial and domestic waste.

A man is on the train track and a train is coming his way but instead of getting off of the tracks right away he runs towards it, and then gets off the track. Why?