ചേരുംപടി ചേർക്കുക :
സ്റ്റുവർട്ട് പിഗോട്ട് & മോർട്ടിമർ വീലർ | വികസിപ്പിച്ച വ്യാപാര ശൃംഖല |
എസ് സി മാലിക് | ഹാരപ്പൻ നാഗരികത ഭരിച്ചിരുന്നത് മൂപ്പന്മാരായിരുന്നു |
ജിം ഷാഫർ | വളരെ വലിയ കേന്ദ്രീകൃത സാമ്രാജ്യമായിരുന്നു |
പോസെൽ | ഹാരപ്പക്കാർ രാജാക്കന്മാരേക്കാൾ കൗൺസിലുകളാൽ ഭരിച്ചിരിക്കാം |
Consider the following statements:
Methane is both a natural and anthropogenic pollutant.
It is primarily responsible for photochemical smog formation.
It is the most abundant hydrocarbon in the atmosphere.
Which of the statements is/are correct?
Which of the following statements about sulphur oxides are correct?
They are released by oil refineries and smelters.
They support the growth of lichens and mosses.
They lead to acid rain.
Which of the following pollutants are matched correctly with their effects?
Sulphur oxides – Destruction of chlorophyll
Nitrogen oxides – Formation of ozone in photochemical smog
Methane – Causes lung cancer
Carbon monoxide – Respiratory blockage due to haemoglobin binding
Carbon monoxide binds with haemoglobin, preventing oxygen transport.
Ethylene accelerates fruit ripening and causes premature leaf fall.
Nitrogen oxides cause acid rain and respiratory issues.
They include benzene and 3,4 benzopyrene.
They are mainly emitted by burning fossil fuels.
They are associated with lung cancer in humans.
Which of the following statements regarding types of pollution are correct?
Natural pollution arises solely from human activities like industrial waste dumping.
Anthropogenic pollution is caused by human actions such as overuse of fertilizers.
Positive pollution involves the addition of harmful substances, reducing fertility.
Negative pollution involves the removal of essential substances, reducing productivity.