Ask mr Brain...all will be explained
How do rain forests produce so much oxygen if there are not many rain forests left? All trees, not just those in rain forests, produce oxygen. Because photosynthesis takes place in rain forest trees year-round, they produce more oxygen than other forests, which become dormant during the winter.
Rain forests actually produce oxygen during daylight hours and carbon dioxide at night.
As they take in carbon dioxide, converting it to wood and leaves, they release oxygen into the atmosphere. When the forest is at full growth, it produces as much oxygen during the day as it does carbon dioxide at night.
Although rain forests are being destroyed at the alarming rate of about 96,000 square kilometres a year, there is little danger the Earth will run out of oxygen.
It would take tens of thousands of years to deplete our oxygen supply - even if all photosynthesis were to stop tomorrow.
As the forests are destroyed, thousands of species of insects, birds and other animals lose their homes and are threatened with extinction.
And as rain forests are burned, they release into the atmosphere from one to three billion tonnes of carbon dioxide a year.
Sales people and checkout operators often rub malfunctioning credit cards on the nearest available item of clothing. Does this actually serve any purpose? One of the most common reasons why a credit card cannot be read is that dust or dirt of some sort has collected on the magnetic strip. This obscures the information from the electronic reader.
A quick wipe on your sleeve is all that it takes to get the card working again, and there is no great mystery or science behind this practice. However, there is one drawback to rubbing the card. This can make it sometimes more difficult to read because it becomes charged with static electricity that can interfere with the electronic reader.
