Question

जंग लगना
5. नीना किराने की कुछ वस्तुएँ खरीदने के लिए
साइकिल से बाजार जा रही थी। बाज़ार उसके घर
से 4 km दूर है । उसने पहले 10 मिनट 12
km/h की चाल से गमन किया। उसे रास्ते में
उसकी मित्र निख़त मिलती है जिससे वह रुककर
15 मिनट बातचीत करती है। इसके पश्चात वह
अपनी यात्रा 8 km/h की चाल से फिर से
आरम्भ करती है। उसकी यात्रा की औसत चाल
क्या है ?
Rkm/h
(2)
10 km/h​

Answer 1

Answer:

Global warming is the long-term heating of Earth’s climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth’s atmosphere. The term is frequently used interchangeably with the term climate change, though the latter refers to both human- and naturally produced warming and the effects it has on our planet. It is most commonly measured as the average increase in Earth’s global surface temperature.

Since the pre-industrial period, human activities are estimated to have increased Earth’s global average temperature by about 1 degree Celsius (1.8 degrees Fahrenheit), a number that is currently increasing by 0.2 degrees Celsius (0.36 degrees Fahrenheit) per decade. Most of the current warming trend is extremely likely (greater than 95 percent probability) the result of human activity since the 1950s and is proceeding at an unprecedented rate over decades to millennia.