Give two reasons why fuels tunkers have warning and safety signs pasted at their back

Explanation:

There are two main reasons for this, first one is to let all workers that may have to open valves to the tanker know that the contents inside can be dangerous/hazardous and to handle with extreme care. The second reason for these safety signs is for traffic. These signs let other drivers know that the tanker is highly dangerous and is a way of telling the other drivers on the road to be extremely careful and allow for enough space so that there is a less likely chance of an accident occurring and the contents of the tanker leaking.

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the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.