Gas stations stock up on flowers because they know idiots like you are either going to completely forget Valentine's Day or just put off buying a gift until the very last minute.
What you pay at the pump also has to do with the stock market and competition with other gas stations nearby.
你在加油站所付的钱也跟股票市场和附近其他加油站的竞争有关。
3
The researchers estimated that emissions of carbon dioxide (CO2), the main greenhouse gas, from today's stock of vehicles, buildings, and power plants would probably drop to zero by 2050.