Disposable environmentally friendly tableware is mainly used in the following aspects:

1. 节约资源：一次性环保餐具通常采用可降解或可回收的材料制成，如纸质、玉米淀粉等，这些材料相对于传统的塑料餐具来说更加环保。使用一次性环保餐具可以减少对传统塑料餐具的需求，从而节约石油等资源的消耗。

1. Resource conservation: Disposable environmentally friendly tableware is usually made of biodegradable or recyclable materials, such as paper, corn starch, etc., which are more environmentally friendly compared to traditional plastic tableware. The use of disposable environmentally friendly tableware can reduce the demand for traditional plastic tableware, thereby saving on the consumption of non renewable resources such as oil.

2. 减少污染：传统的塑料餐具在使用后往往不能降解，容易造成大量白色污染。而一次性环保餐具采用可降解的材料制成，能够在一定时间内自然分解，减少对环境的污染。

2. Reduce pollution: Traditional plastic tableware often cannot degrade after use, which can easily cause a large amount of white pollution. Disposable environmentally friendly tableware is made of biodegradable materials, which can naturally decompose within a certain period of time and reduce environmental pollution.

3. 卫生：一次性环保餐具经过严格的生产工艺和卫生检测，确保了其符合食品标准。使用一次性环保餐具可以有效避免食品交叉污染，提高消费者的用餐。

3. Health and safety: Disposable environmentally friendly tableware has undergone strict production processes and hygiene testing to ensure that it meets food safety standards. The use of disposable environmentally friendly tableware can effectively avoid food cross contamination and improve consumer dining safety.

4. 方便快捷：一次性环保餐具轻便易携带，可以随时随地使用。对于外出就餐或者快速用餐的场合，一次性环保餐具能够提供便利和效率。

4. Convenient and fast: Disposable environmentally friendly tableware is lightweight and easy to carry, and can be used anytime, anywhere. For dining out or quick dining occasions, disposable environmentally friendly tableware can provide convenience and efficiency.

总体来说，一次性环保餐具主要通过节约资源、减少污染、保证卫生以及提供方便快捷的特点，在各类场合中得到广泛使用。但需要注意的是，尽管一次性环保餐具相对于传统塑料餐具来说更加环保，但在实际使用中仍需注意正确的处理方式，如分类回收等，以限度地减少对环境的负面影响。

Overall, disposable environmentally friendly tableware is widely used in various occasions by saving resources, reducing pollution, ensuring hygiene and safety, and providing convenient and fast features. However, it should be noted that although disposable environmentally friendly tableware is more environmentally friendly than traditional plastic tableware, it is still necessary to pay attention to the correct handling methods in practical use, such as classification and recycling, to minimize the negative impact on the environment.