The U.S economy produce 20% of the world's output
Answer:
Explanation:
1) We lived int he 1720s. We are a hunting and gathering tribe.
2) We lived in near mountain terrain and near forests. Its dry and rocky. And cold in winter and hot in summer.
3) men women and children. Awe have 24,890 women, 56,789 men And 13,896 children. We wore animal skin.
4) we are nomadic. We gather and hunt. Both. Berries, rabbits, and deer.
5) we slept in tents. We cooked outside. We bathed in rivers and lakes.
6) it does not have a name
7) we gaint he animals trust and train them to help us hunt and sniff for berry bushes. We feed the animals berries and meat.
8) Our tribe uses bows and arrows, spears, and axes for hunting. We use our hands and rocks for harvesting and digging.
9) There are times we are hungry in the winter mostly.
10) no
The justification hypothesis that the early Earth environment was void of oxygen is:
- atmosphere lacked oxygen but abundant in methane, ammonia, water vapour, noble gas, neon etc.
<h3>What did scientist proved about oxygen-less earth?</h3>
Studies revealed that the Earth's atmosphere was devoid of oxygen before more than 2.4 billion years ago.
However, some scientist proved that oxygen get brewing in the atmosphere from the oceans where a cyanobacterial photosynthesis occurred for about as 3 billion years ago.
Read more about Earth environment
<em>brainly.com/question/617302</em>
The correct answer is D. As levels of carbon dioxide increase, average global temperatures are increasing
Explanation:
During the last decades, especially since the beginning of the Industrial Revolution carbon dioxide levels in the atmosphere had increased, this can be explained as changes in the manufacture processes and in society had led to extensive use of fossil fuels as well as massive deforestation. Additionally, the increase of carbon dioxide along with other gases had caused the global warming that refers to an increase in the temperature due to the heat and radiation that is trapped by greenhouse gases such as carbon dioxide, this phenomenon is causing widespread concern because it leads to changes in weather, increase of sea levels, extinction of species, among others . According to this, the one that is causing widespread concern is "As levels of carbon dioxide increase, average global temperatures are increasing".
