an example is in June the Northern Hemisphere gets more direct sunlight, and the Southern Hemisphere is experiencing winter. in March and September both of the hemispheres receive the same amount of energy from the sun. this is because neither end of the axis is tilted toward the sun.

During spring and autumn, both hemispheres receive about the same amount of sunlight.

During an equinox, solar declination is 0°—the Equator—and both the Northern and Southern Hemisphere receive equal sunlight.) Sometimes, solstices are nicknamed the “summer solstice” and the “winter solstice,” although these have different dates in the Northern and Southern Hemispheres.

Sunlight striking the surface at an angle is “spread” across a wider area compared to sunlight striking perpendicular to Earth’s surface. Areas that receive more scattered sunlight receive less energy from our Sun. When the northern half of Earth is tilted toward the Sun, the southern hemisphere is tilted away.

The angle of sunlight is greater in the Southern Hemisphere during the winter. During the June solstice, the opposite is true. The Northern Hemisphere receives the maximum intensity of the sun’s rays, while the angle of sunlight decreases in the Southern Hemisphere.

equator

This generally means the Southern Hemisphere experiences warmer winters. Since water conducts and retains heat better than land, the Southern Hemisphere, which is around 81% ocean, is overall warmer. The Northern Hemisphere, on the other hand, is around 61% ocean, making it colder in comparison.

There is less ozone here to block the UV rays that cause sunburn. Earth’s orbit takes it closer to the sun during the southern summer than during the northern summer. There is less pollution in the southern-hemisphere to block the UV rays. The sun’s burning strength is measured by the UV index.

According to Scripps Atmospheric Scientist Ray Weiss the answer is no, even though it feels that way. He says it’s not that the sun is stronger, but rather the ozone layer is thinner meaning more UV rays are coming through.

The Sun is becoming increasingly hotter (or more luminous) with time. Astronomers estimate that the Sun’s luminosity will increase by about 6% every billion years. This increase might seem slight, but it will render Earth inhospitable to life in about 1.1 billion years. The planet will be too hot to support life.

Nearly half of UV radiation is received between 10 a.m. and 4 p.m., when the sun’s rays are the strongest. Even on a cloudy day, you can be sunburned by UV radiation.

You can’t get burned after 4 o’clock. The sun is at it’s highest between 11 a.m. and 4 p.m. but that doesn’t mean the sun can’t be damaging before or after these times. You should be aware of your local UV index.

The effects of clouds and air pollution on UV are higher than on total solar radiation, and the reduction in UV is about twice as large as the total solar radiation values.

Not many realise that It’s only the early morning sun — that is, from 7 am to 9 am — that helps generate Vitamin D. After 10 am, exposure to sunlight is harmful for the body.

Take these steps to stay sun-safe:

• Seek shade: Limit your direct exposure to the sun, especially between 10 a.m. and 4 p.m., when UV rays are strongest.
• Cover up: When you are out, wear clothing and a wide-brimmed hat to protect as much skin as possible.

Smog is air pollution that reduces visibility. When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog. Ozone can be helpful or harmful. The ozone layer high up in the atmosphere protects us from the sun’s dangerous ultraviolet radiation.

The culprit is smog. The ozone layer in the stratosphere, or upper atmosphere, protects you by blocking harmful ultraviolet radiation from the sun, but ozone in the troposphere, or ground level, is a major component in smog [source: EPA]. When the sun’s rays hit the smog, it breaks down into free radicals.

Smog can irritate your eyes, nose and throat. Or it can worsen existing heart and lung problems or perhaps cause lung cancer with regular long-term exposure. It also results in early death. Studies on ozone show that once it gets into your lungs, it can continue to cause damage even when you feel fine.

Slow to act at first, the British government ultimately passed the Clean Air Act four years later, in 1956, as a direct response to the lethal fog. The act established smoke-free areas throughout the city and restricted the burning of coal in domestic fires as well as in industrial furnaces.

4,000 people

Why Smog Kills Smog can cause you to experience shortness of breath, wheezing, coughing, pain during breathing, inflammation of breathing passages, nose irritation, eye irritation, dried nasal and throat membranes, and interference with your body’s ability to fight illness and infections.

More than 9,000 people in the capital were dying early each year due to dirty air in 2015. The report from the mayor of London, reviewed by scientists, shows that more than 2 million people in the capital lived with polluted air in 2016, but this fell to 119,000 in 2019.

In London, the research indicates an average cut in lifespan of four months. The global average reduction in lifespan is 1.8 years – more than the 1.6 years that results from smoking tobacco.

What country has the worst air quality?

Air pollution Most pollution in London is caused by road transport and domestic and commercial heating systems. The UK Air Quality Standards Regulations 2010 sets standards for a number of pollutants than can harm human health and the environment. These are based on EU limit values and include: sulphur dioxide (SO2)

In 2019, over 39% of comparable sites in London’s air quality monitoring network exceeded annual limits for NO2, while a whopping 80% of monitoring sites recorded levels of PM2. 5 above the World Health Organization’s recommended limit*.

Living in London ‘poses same risk to health as living in nuclear fallout zone’ People who live in a contaminated area in the aftermath of a nuclear disaster would likely lose a few months of life expectancy and have a greater chance of developing cancer, according to the university study.

Most polluted areas in London