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пестицид

A pesticide is a substance used to kill a pest, and in a farming context a pest is anything that attacks or competes with crops. Hence, there are many different types of pesticides: for example, insecticides kill insects, and herbicides kill weeds. The chemicals used in pesticides can sometimes be toxic to humans, however, so organic farming endeavours to use natural rather than synthetic substances as pesticides.

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Vārdšķira: noun
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Blossary:
Nozare/domēns: Natural environment
Category: Climate change
Company: BBC
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дизель

Natural environment; Climate change

Ordinary diesel, like regular petrol, is refined from oil but it is a thicker, heavier liquid with a higher 'energy density' - meaning it offers better fuel economy. On the down ...

диоксиндер

Natural environment; Climate change

Dioxins are chlorine-containing chemical compounds formed and emitted into the atmosphere usually as byproducts of human activity - waste incineration and fuel combustion being ...

экожүйе

Natural environment; Climate change

An ecosystem is the term applied to the interaction of a community of different living (organic) species - plants, animals and micro-organisms - with non-living (or inorganic) ...

кірленулер

Natural environment; Climate change

Emissions are the CO2 (and other greenhouse gases) produced by energy use, usually calculated and stated as an annual tally: also referred to as your carbon footprint. Your ...

энергия әсерлілігі

Natural environment; Climate change

Something that is energy efficient achieves the greatest useful output for the least expenditure of energy, or improves the ratio between the two. For example, energy efficient ...

энергия қарқындылығы

Natural environment; Climate change

An energy-intensive process uses a great deal of energy - and therefore produces high emissions - relative to its useful output. As an example, beef production, has recently been ...

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Nozare/domēns: Chemistry Category: General chemistry

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After separating from graphite, graphene is the world's thinnest and strongest material. This one-atom, carbon-based material can conduct electricity ...