Answer:
A) ozone
Explanation:
Ozone is a secondary pollutant, that is, it is not emitted directly, but formed from other air pollutants, and highly oxidizing in the troposphere (lower layer of the atmosphere). Ozone is found naturally in the stratosphere (layer located between 15 and 50 km in altitude), where it has the positive function of absorbing solar radiation, preventing most of the ultraviolet rays from reaching the Earth's surface.
The formation of tropospheric ozone occurs through complex chemical reactions that take place between nitrogen dioxide and volatile organic compounds, in the presence of solar radiation. These pollutants are emitted mainly in the burning of fossil fuels, fuel volatilization, animal husbandry and in agriculture.
The p wave on an electrocardiogram (ecg) represents the depolarization of cells in the sinoatrial (SA) node.
<h3>What is sinoatrial node?</h3>
The sinoatrial node is close to the opening of the superior vena cava. This bundle of nerve tissue propagates electrical impulses and therefore governs sinus rhythm from minute to minute.
Electrocardiogram is a test, it is possible to detect the rhythm of the heart and the number of beats per minute.
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<span>A. Science creates new technology without creating any problems. </span>
Sugar comes from either sugar cane or sugar beet<span> with the climate of a geographical region being the prime influence on which is grown. In both cases, the juice is extracted from the </span>sugar beet<span> or cane and impurities are removed. It is then crystallised into white sugar, which is 99.95% sucrose.</span>