Climate forcings are changes that cause temperatures to rise or fall, disrupting the energy balance, these include natural and man-made forcings..

A climate emergency declaration or declaring a climate emergency is an action taken by governments and scientists to acknowledge humanity is in a climate emergency.

Climate drawdown is the point at which greenhouse gas concentrations in the atmosphere level off and begin to decline on a year-to-year basis.

Climate crisis is a term describing global warming and climate change, and their consequences.

Climate classification is a way of categorizing the world's climates.

Climate change mitigation consists of actions to limit global warming and its related effects.

Climate change includes both global warming driven by human emissions of greenhouse gases and the resulting large-scale shifts in weather patterns.

Clean technology is any process, product, or service that reduces negative environmental impacts through significant energy efficiency improvements, the sustainable use of resources, or environmental protection activities.

Clean Tech Law contemplates a diverse set of legal and policy issues related to the development and commercialization of clean technology.

The Clean Energy Ministerial is a high-level global forum to promote policies and programs that advance clean energy technology, to share lessons learned and best practices, and to encourage the transition to a global clean energy economy.

Energy that is produced from sustainable resources and has zero environmental impact.

The Clean Air Act is a United States federal law which limits national air pollution.

In electrical engineering class of accuracy is a figure which represents the error tolerance of a measuring device.

A class is a collection whose members either fall under a predicate or are classified by a rule.

Cladding is the outer layer of the fuel rods, standing between the coolant and the nuclear fuel.

Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including public works such as roads, bridges, canals, dams, airports, sewerage systems, pipelines, structural components of buildings, and railways.

Used to automatically protecting a circuit from a surge or overcurrent condition, if activated it can be reset once the fault has been rectified.

Chrome plating is a technique of electroplating a thin layer of chromium onto a metal object.

Used in isolated solar systems where the inverter draws its DC energy from batteries charged by photovoltaic arrays.

Stall-regulated wind turbine have blades designed so that when wind speeds are high, the rotational speed decreases with increasing wind speed.