Environmental Science

The biosphere is the highest and most comprehensive level of ecological hierarchy, encompassing all living organisms and their interactions with Earth's systems. A biome is a large ecosystem type. A community is populations of different species. A population is individuals of one species.

Modern biodiversity conservation recognizes diversity at all levels: genetic (within species), species (between species), and ecosystem (across habitats). All three levels are interconnected and essential for comprehensive conservation efforts.

The Mediterranean climate is characterized by hot, dry summers and mild, wet winters, due to subtropical high pressure in summer and westerly winds in winter. This pattern is distinct from monsoon systems (summer rain) or regions with year-round rainfall.

About 3% of Earth's total water is freshwater, which is the only water suitable for human consumption. The rest 97% is saltwater in oceans and seas, which cannot be used for drinking without extensive treatment.

WWF stands for World Wide Fund for Nature (formerly World Wildlife Fund), an international non-governmental organization founded in 1961 to work on wilderness preservation and reducing human impact on the environment.

Overusing fertilizers and chemical pesticides degrades soil quality, reduces fertility, and harms beneficial organisms in the ecosystem. True land conservation methods include afforestation, controlled grazing, and regulated chemical use to maintain long-term land productivity.

Norway generates approximately 95-98% of its electricity from hydroelectric sources, the highest ratio in the world. This is due to its mountainous terrain with abundant water resources, including fjords and rivers, making it ideal for hydroelectric power generation.

Ecosystem means interdependence of living beings for survival.

Mulching helps in moisture conservation. As these mulches slowly decompose, they provide organic matter which helps keep the soil loose.

Marine ecosystems cover about 71% of Earth's surface, making them the largest ecosystem by area. This includes all oceans and seas, which far exceed the total area of all terrestrial ecosystems combined - deserts cover about 33%, mountains about 25%, and other land ecosystems the remainder.

The Earth Summit (UNCED - United Nations Conference on Environment and Development) was held in Rio de Janeiro, Brazil in June 1992. This landmark global conference addressed environmental issues and produced key agreements including the Convention on Biological Diversity and the Framework Convention on Climate Change.

Carbon dioxide is the primary greenhouse gas responsible for atmospheric warming through the greenhouse effect. Increased CO₂ from burning fossil fuels, deforestation, and industrial activities traps more heat in the atmosphere, causing global temperatures to rise. Other factors listed are either unrelated or would decrease warming.

The first international conference for globalizing the environmental problems was held at Stockholm.

Coniferous forests (also called taiga or boreal forests) dominate Scandinavia due to their adaptation to cold northern climates. These evergreen forests, featuring trees like spruce, pine, and fir, are well-suited to survive harsh winters with snow and short growing seasons characteristic of the region.