請(qǐng)用英語(yǔ)翻譯下列句子：

1. First, we need to save water and electricity. After using it, turn it off immediately. Never forget it!
2. We need to categorize the wastes, this could be helpful to the protection of environment and recycling of trash.
3. We should lessen the using of tissue, but more handkerchieves.
4. We should take walking, riding bike or bus as transportation media, this can reduce the emission of CO2(carbon dioxide).

如果是宣傳用的話，最好不要用人稱。。

你能把要翻譯的弄下來(lái)嗎？不然你要我們翻譯什么