Answer:
Youngest: Niger
1. Niger — 50.12% under 15.
Oldest: Japan
Japan has the highest old-age dependency ratio of all OECD countries – there is one person over 65 for every two people between the ages of 20 and 64.
Explanation:
Answer:
Petroleum is oil from the remains of water organisms, the oil can be found beneath the ocean floor. Petroleum is a crude oil, and is made of pure chemical compound.
There are 50 states of the US
Answer:
1. 2. chemicals in the injected fluids can get into groundwater that is used for drinking water;
B). Hydraulic fracturing allows geologists to capture natural gas stored in the pore spaces of shale.
Explanation:
- Fracking is a huge amount of the water that must be transported to sight at a significant environmental cost and occurrence of the minor tremors and is environmentally and potentially dangerous chemicals of they escape during the drilling and pollute the groundwater.
- And the hydraulic fracking is drilling methods used to extract the natural oil and gas from deep inside the earth and is used to study the geology of the earth.
