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Ecological niche
In ecology, a niche is a term describing the relational position of a species or population in an ecosystem. More formally, the niche includes how a population responds to the abundance of its ... > more -
Petrified wood
Petrified wood is a type of fossil: it exists of fossil wood where all the organic materials have been replaced with minerals (most often a silicate, such as quartz), while retaining the original ... > more -
Weapons Technology
Nuclear Energy
Renewable Energy
Energy and the Environment
Physics
Environmental Science
Effects of nuclear explosions
A nuclear explosion occurs as a result of the rapid release of energy from an uncontrolled nuclear reaction. The driving reaction may be nuclear fission, nuclear fusion or a multistage cascading ... > more -
Phosphorus
Phosphorus is the chemical element in the periodic table that has the symbol P and atomic number 15. Phosphorus is commonly found in inorganic phosphate rocks and in all living cells. The most ... > more -
Water pollution
Water pollution is a large set of adverse effects upon water bodies (lakes, rivers, oceans, groundwater) caused by human activities. Although natural phenomena such as volcanoes, storms, earthquakes ... > more -
Agroecology
Agroecology is the science of applying ecological concepts and principles to the design, development, and management of sustainable agricultural systems. Agroecology is the science of sustainable ... > more -
Invasive species
Invasive species is a phrase with several definitions. The first definition expresses the phrase in terms of non-indigenous species (e.g. plants or animals) that adversely effect the habitats they ... > more -
Refrigerant
A refrigerant is a compound used in a heat cycle that undergoes a phase change from a gas to a liquid and back. The two main uses of refrigerants are refrigerators/freezers and air conditioners. Cf. ... > more
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