WHY DO TREES USE CARBON DIOXIDE

Trees carry out process of respiration in which CO2 is utilized. That is, they absorb Carbon Dioxide the process called Photosynthesis. 

Photosynthesis is the conversion of light energy into chemical energy by living organisms. The material are Carbon Dioxide (CO2) and water, the energy source is sunlight, and the end-products include glucose and oxygen. 

why do trees grow upwards

Trees grow up because they are trying to get closer to the sun, in order to fuel  the process of photosynthesis. 

why do trees lose their leaves

Trees lose their leaves seasonally a especially during Autumn, and to the shedding of other plant structures such as petals after flowering or fruit when ripe. 

material used to make cement

Gypsum is also used to make the cement set more slowly, The main ones are Limestone and Shale. 

what is the raw material used to make petrol

Petroleum, from Medieval Latin petroleum, from Latin petra rocklatin: oleum oil is a naturally occurring, yellow-to-black liquid found in geologic formations beneath the Earth's surface, which is commonly refined into various types of fuels. It consists of hydrocarbons of various molecular weights and other liquid organic compounds. The name petroleum covers both naturally occurring unprocessed crude oil and petroleum products that are made up of refined crude oil. Afossil fuel, petroleum is formed when large quantities of dead organisms, usually zooplankton and algae, are buried underneath sedimentary rock and subjected intense heat and pressure.