User:Maligemeena/Sandbox

What is the Kyoto protocol? The Kyoto protocol is an international agreement aimed at fighting global warming. The countries that have signed the protocol have committed themselves to reduce the emission of greenhouse gases step by step, and thus prevent air pollution and global warming. The name of the contract comes from the Japanese city of Kyoto, where this agreement was signed in 1997. Most of the countries of the world have signed the protocol, but many of them have not yet implemented wholeheartedly as they fear that it would adversely affect their economy. How do bats orient themselves with ultrasounds? Bats cannot see very well. To orient themselves during their night flights, they emit ultrasounds. We cannot hear these sounds. The ultrasonic waves falling on obstacles or preys get reflected back and reach the sensitive ears of bats. Thus, they come to know what all is present around them and where their prey is. This concept is used in shipping to determine the depth of the sea using a device called sonar. It comprises a sound transmitter, a receiver, and a clock. The time difference between sending and receiving sound waves is measured ,which is used to calculate the depth of the sea.