Blog:There Is No Energy Crisis, There is a Crisis of Ignorance

This video talks about the different types of energy in the world. In developed countries much energy is wasted while in developingcountries is poor any kind of energy. 

Plants are used to pollute the environment while we ecological resources such as solar, hydraulic, ... And if we keep this, the planet will die.

Blog: Globalization, by Noam Chomsky

This video talk about globalization. Many countries are only thinking of buying weapons, the liberalization of borders ... and others are against it,which doesn't agree and globalization is delayed. I'm agree with globalization for trade food, clothes,... Because we can know the different cultures of other countries,...

Oil: for and against

The oil is an organic substance consists essentially of hydrocarbons extracted from the interior of the Earth, hydrocarbons that are obtained from the fossilized organic moieties such as dinosaurs extinct .. At the same time, despite being an organic substance, oil is a complex compound which are not edible and can cause severe damage to both the health of living beings and the planet.

Importance of water

Water is one of the most important substances on earth. All plants and animals must have water to survive. If there was no water there would be no life on earth.

Agriculture as a system

Crop farming

Crop farming is a common means of food production all over the world and its importance is not expected to decrease in the future. Crop farming techniques allow food to be grown and harvested en mass, while decreasing the risks associated with plant disease, insect damage and inadequate soil hydration. Fruits, vegetables, grains, soy, nuts, tobacco and cotton are all important foods and agricultural products produced nearly exclusively through crop farming.  Recent technological advancements have led to improvements in crop farming, resulting in less damage to the environment and better crop yields.

Physical factors affecting farming

  Climate: Temperature – a minimum temperature of 6°C is needed for crops to grow. The growing season is the number of months the temperature is over 6°C. Different crops need a different growing season, e.g. wheat needs 90 days. Rainfall – all crops and animals need water.
Relief: Temperatures decrease by 1>°C every 160 metres vertical height.
Uplands are more exposed to wind and rain. Steep slopes also cause thin soils and limit the use of machinery. Lowland areas are more easily farmed.
Soils: Crops grow best on deep, fertile, free-draining soils, e.g. the brown earths found in lowland Britain. Less fertile soils prone to water logging are best used for pastoral farming.
Aspect: The direction a slope faces. South-facing slopes are best for growing crops.