Why is it hot in summer and cold in winter?

The reason why summer and winter exist is because of the tilt of the earth's axis, which causes the earth to face the sun alternately with the northern and southern hemispheres throughout the year. To put it quite simply, the fact is that in summer the Sun rises high above the horizon, and in winter it is low, and therefore in winter the surface of the earth is less illuminated.
Our partners:
airvoice.global
Airvoice produces comprehensive air quality monitoring networks and services for urban areas; digital twins and monitoring networks to forecast and manage air quality for industries; indoor air quality monitoring and management system for buildings.
dnair.in
DNAir brings to the Indian market unique air supply technology for clean and healthy indoor climate. Breathe Himalayan-like air even in Central Delhi.