(In other words, there were 200 to 280 molecules of the gases per million molecules of air.) But in the past century, that concentration has jumped to more than 400 parts per million, driven up by human activities such as burning fossil fuels and deforestation. While some of this infrared light continues on into space, the vast majority-indeed, some 90 percent-gets absorbed by atmospheric gases, known as greenhouse gases, and redirected back toward the earth, causing further warming.įor most of the past 800,000 years-much longer than human civilization has existed-the concentration of greenhouse gases in our atmosphere was between about 200 and 280 parts per million. This heat is then radiated back up in the form of invisible infrared light. While 30 percent of the solar energy that reaches our world is reflected back to space, approximately 70 percent passes through the atmosphere to the earth’s surface, where it is absorbed by the land, oceans, and atmosphere, and heats the planet. Identified by scientists as far back as 18 96, the greenhouse effect is the natural warming of the earth that results when gases in the atmosphere trap heat from the sun that would otherwise escape into space. Here’s a look at what the greenhouse effect is, what causes it, and how we can temper its contributions to our changing climate. The result? An increase in global warming that is altering the planet’s climate systems in countless ways. The problem is, mankind’s voracious burning of fossil fuels for energy is artificially amping up the natural greenhouse effect. Without it the world would be a frozen, uninhabitable place, more like Mars. It warms the planet to its comfortable average of 59 degrees Fahrenheit (15 degrees Celsius) and keeps life on earth, well, livable. The Consequences of the Greenhouse Effect.Step 5: You will be refunded upon the confirmation of the return.
Step 4: You will receive a call from Aramex to confirm pickup. Step 3: You have the choice to copy the “AWB” to the package, or print the label and tape it to the package. Step 2: An email will be sent from Aramex, including a 12-digit number called the Airway Bill Number “AWB”. Share the required details with the customer service representative.
Returned items must be in an unused condition, and in their original packaging A copy of the invoice should be included H&M sale Online Return Process Step 1: Call Alshaya Customer service on 800-74292 and inform them that you want to return items.
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Delivery cost is DHS 20, or FREE on orders over DHS 99) Click & Collect Home Delivery Standard delivery within 1-2 days to: Dubai Abu Dhabi Store Return Process Items can be returned to any H&M store within 15 days of receipt of your order, as indicated in your dispatch email.
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