Answer:
3. biological hazard
Explanation:
Any hazard that can be carried around the world and spread through contact can be spread quickly, specially owing to the mobility of humans. Noninfectious diseases cannot be transferred via human mobility as it is noninfectious. Chemical hazard require the chemical to be physically transported without the need for human itself. Physical hazard, as well, require the hazard to be transported or travel on its own without the influence or interference of humans. Biological hazard can be transmitted via human body as they become the carrier of the hazard.
49993847757492425775e161746481yt7e827251
Answer: undergound economy is when goods and services are bought and sold under the table without receipts, invoices or bills or any document that accredits the transaction. The intention is not to pay taxes and avoid expenses related to the transactions.
Explanation: the reason of underground economy is mainly poverty, ignorance and excessive regulation. Governments also make the cost of being formal and paying taxes very expensive with excessive regulations that tend to sink companies with high taxes and debt.
Yes, this is true!
Nuclean plants need to be kept at a relatively low temperature, which means that they need a lot of cooling. The most widely used cooling technique is water circulation (similar to central heating system) and this is why a lot of water is used.
