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In spring and summer the most abundant substance in leaves is chlorophyll, which gives them their green colour. Chlorophyll is essential for photosynthesis, the process which converts the energy of sunlight into sugar. Sunlight is also necessary for the synthesis of chlorophyll itself.

Amphibians are members of a group of tetrapod (4-legged) vertebrate animals derived from fishes, and are the common ancestor to mammals and reptiles.

Dominion of Canada is the country’s formal title, though it is rarely used. It was first applied to Canada at Confederation in 1867. It was also used in the formal titles of other countries in the British Commonwealth. Government institutions in Canada effectively stopped using the word Dominion by the early 1960s. The last hold-over was the term Dominion Day, which was officially changed to Canada Day in 1982. Today, the word Dominion is seldom used in either private or government circles.

Chiroptera is the order of mammals (Mammalia) that includes all bats, living (~1200 species) and fossil.

The Fowler’s toad (Anaxyrus fowleri) is a medium-sized, earthen-coloured toad that is native to Eastern North America. In Canada, Fowler’s toads are only found in a few small areas along the north shore of Lake Erie. This species lives in places with sandy or gravelly soils into which individuals can burrow; Fowler’s toads spend much of their time underground. Due to small and declining populations, the Fowler’s toad is endangered in Canada.

Current theory states that the energy driving auroras is obtained from the solar wind, a gas composed primarily of protons and electrons, blowing away from the SUN at supersonic velocities of 300-1000 km/s (seePHYSICS).

The American eel (Anguilla rostrata) is an elongated fish with a round body and long dorsal fin. It is one of about 35 eel species found in Canadian waters and the only freshwater eel species found in North America. In Canada, the American eel is treasured and valued as food by many Indigenous peoples, including the Mi’kmaq, Innu, Abenaki, Haudenosaunee and Cree. Common names for the American eel include Atlantic eel, common eel and freshwater eel. Indigenous peoples in Canada have their own names for eel. For example, the Mi’kmaq call the eel katew (singular) and kataq (plural) while the Cree refer to it as kinebikoinkosew. Eels are fished recreationally and commercially in Canada.

Horse (Equus caballus), herbivorous mammal possessing single toes or hoofs (ie, ungulate), contributing to its speed.

Substances used to control pests include insecticides (for control of insects), fungicides (for disease-causing fungi), herbicides (for weeds), rodenticides (for rodents), avicides (for birds), piscicides (for fish) and nematicides (for nematodes).

Floods are primarily caused by naturally occurring changes in the height of rivers, lakes and oceans. According to Public Safety Canada, floods are the most common natural hazard in the country and among the costliest. Historic floods have occurred across Canada, with many of the worst happening on major river systems that pass through populated areas. Scientists predict that flooding linked to the impacts of climate change will increase as the 21st century progresses, particularly in coastal areas of the country.

The Subarctic covers a relatively large area in eastern Canada; its western counterpart, formed where Pacific and Arctic waters meet and mix, is restricted to a narrow band along the shore of the Beaufort Sea (see Coastal Waters).

Tidal energy is a largely untapped, renewable energy source based largely on lunar gravitation. While the potential of tidal hydroelectricity has long been recognized, compared to river dams, tidal power projects are expensive because massive structures must be built in difficult saltwater environments.

Wetlands cover about 14 per cent of the land area of Canada, and are the natural habitat of over 600 species of plants, animals and insects. In addition to providing a home for these plants and animals, wetlands are an essential part of the environment because they prevent flooding, filter toxins, store groundwater and limit erosion. The most common wetland habitats are swamps, marshes, and bogs.

Midges are small, slender-bodied flies with long antennae, belonging to various families. Three families are especially important: non-biting midges (Chironomidae), biting midges (Ceratopogonidae, also called no-see-ums), and gall midges (Cecidomyiidae). In Canada, there are more than 1,300 named species of midges from these groups, and scientists expect at least as many more live here. The larvae of most non-biting and biting midges are aquatic, while most larval gall midges live and feed inside of growths on plant tissues. Midges are found all across Canada and in a variety of habitats.

Frogs are amphibians belonging to the order Anura. Worldwide, frogs are the most numerous group of amphibians, with more than 5,000 living species. They are found on all continents except Antarctica. There are 24 species of frog currently found in Canada. In addition, one species, the Blanchard’s cricket frog, is extirpated. This means that, while it continues to live in other parts of its range, it is no longer found in Canada. Five of Canada’s frog species are toads, which are frogs belonging to the family Bufonidae.

While most frog species in Canada are found in the southern reaches of the country, a few, for example the boreal chorus frog, have ranges extending into Yukon and the Northwest Territories, and in the case of the wood frog, Nunavut.

The environmental movement seeks to protect the natural world and promote sustainable living. It had its beginnings in the conservation efforts of the early 1900s. During this time, conservationists aimed to slow the rapid depletion of Canadian resources in favour of more regulated management. Many scholars divide the evolution of the environmental movement into “waves.” These waves are periods in time easily characterized by certain themes. While the number of waves and their characterization may differ from scholar to scholar, they’re often defined as follows: The first wave focused on conservation; the second, pollution; the third, the professionalization of environmental groups; and the fourth, climate change.

Natural resources are aspects of the natural environment from which goods and services can be obtained and produced. They include air, sunlight, water, land, vegetation, animal life and geological resources. People can also value natural resources for their own sake or for their aesthetic qualities. Humans must manage natural resources to sustain the benefits they offer.

Canada is among the most resource-rich countries in the world. Its large and varied natural resources are essential to its economies and cultures. But there are ongoing debates about how to use, share and manage natural resources.

Click here for definitions of key terms used in this article.

This is the full-length entry about natural resources in Canada. For a plain-language summary, please see Natural Resources in Canada (Plain-Language Summary).

In the atmosphere, between about 1.2 and 1.6 km above the Earth's surface, winds tend to blow parallel to rather than across the lines of equal pressure (isobars).

Rabbit farming, officially called cuniculture (from the species name for wild rabbits, Oryctolagus cuniculus), is a small part of Canadian agriculture, with most production in Ontario and Québec.