Answer:
The imaginary line that separates light from the darkness and day from the night is known as the circle of illumination. Earth's axis refers to an imaginary line going through the centre of the earth from top to bottom. The circle of illumination cuts all latitudes into half on the spring and autumnal equinoxes.
I believe it is Ben Nevis
Answer: B. participate in the hydrologic cycle
Explanation: Residence time of water is the rate of water in a water reservoir such as the ocean or the atmosphere divided by how fast more water is added to it or lost from it.
While residence time is thousands of years in oceans, water in the atmosphere has a short residence time of abut 10 – 11 days. This allows it to participate in the hydrologic cycle which includes evaporation and precipitation. Water in the atmosphere precipitates as snow or rain, returning to other water reservoirs.
Answer:
Aquaculture has been considered as an option to cope with the world food demand. However, criticisms have arisen around aquaculture, most of them related to the destruction of ecosystems such as mangrove forest to construct aquaculture farms, as well as the environmental impacts of the effluents on the receiving ecosystems. The inherent benefits of aquaculture such as massive food production and economical profits have led the scientific community to seek for diverse strategies to minimize the negative impacts, rather than just prohibiting the activity. Aquaculture is a possible panacea, but at present is also responsible for diverse problems related with the environmental health; however the new strategies proposed during the last decade have proven that it is possible to achieve a sustainable aquaculture, but such strategies should be supported and proclaimed by the different federal environmental agencies from all countries. Additionally there is an urgent need to improve legislation and regulation for aquaculture. Only under such scenario, aquaculture will be a sustainable practice.
