Gases that contribute to the greenhouse effect include: 1  Water vapor. 2  Carbon dioxide (CO 2). 3  Methane. 4  Nitrous oxide. 5  Chlorofluorocarbons (CFCs).ases that contribute to the greenhouse effect include: 1  Water vapor. 2  Carbon dioxide (CO 2). 3  Methane. 4  Nitrous oxide. 5  Chlorofluorocarbons (CFCs).
Parallel parking. Parallel parking is a method of parking a vehicle parallel to the road (hence the term 'Parallel Parking'), in line with other parked vehicles. Parallel parking usually requires initially driving slightly past the parking space, parallel to the parked vehicle in front of that space, keeping a safe distance, then followed by reversing into that space.
The size of the area rests upon the purpose of the space. The bigger spaces are used if there is high retail customer / high turnover rate. Parking that is adjoining the curb is typically 20 ft (6.1 m) long and 9.1 ft (2.7 m) wide. The parallel spaces are usually marked 6.9 to 7.7 ft (2.1 to 2.34 m) wide.