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What was the major decision that took place in the 1987 Montreal Conference? A. Developed countries will completely ban CFC production by 2000 B. Developed countries will completely ban CFC production by 2010 C. Developing countries will completely ban CFC production by 2000 D. Developing countries will completely ban CFC production by 2020
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
Which assumptions are implied from the below statement? Statement: Ozone layer depletion is caused by excessive Chlorofluorocarbons which are majorly emitted by refrigerants and air conditioners. Assumptions: I: Reducing the use of refrigerants and air conditioners will protect the ozone layer. II: The ozone layer is beyond saving now.
Some small cubes of same height 7 cm but variable length and width are put inside a large cuboid of height 21 cm. Length and width of cuboid is 32 cm and 24 cm, respectively. Small cubes are put such that cubes at the bottom most layer is of similar base area; second layer contains all the cubes of similar base area and third layer have all the cubes of similar base area. Which of the following statement(s) given below is / are TRUE? A: If side of each small cubes at bottom most layer is 8 cm, then maximum number of small cubes that can be put at bottom most layer is 12. B: If maximum of 48 cubes can be put at second layer, then side of each cube at second layer is 6 cm. C: If side of each small cubes at third layer is 1.6 cm, then maximum number of small cubes that can be put at third layer is 300.
Which of the following statements is/are correct concerning Ozone gas? 1. Good ozone is found in the upper part of the atmosphere called the Troposphere. 2. The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of Dobson units (DU).  3. Research indicates that depletion of the stratospheric ozone layer is being reduced worldwide.  Select the correct answer using the code given below.
Consider the following statements: 1. Ozone is found mostly in the Stratosphere. 2. Ozone layer lies 55 - 75 km above the surface of the earth. 3. Ozone absorbs ultraviolet radiation from the Sun. 4. Ozone layer has no significance for life on the earth. Which of the above statements are correct?
The following table shows CFC emissions (in million metric tons) from various sectors for an industry for a period of 5 years. Based on the table answer the question given below. Sector Year Cement Fertiliser Foam Pesticides 2015 200 500 80 100 2016 300 600 90 110 2017 320 650 100 120 2018 400 700 150 150 2019 450 800 200 180 What is the approximate contribution in percentage in CFC emissions from the cement sector, in comparison to that of the total CFC emissions from all the sectors in 2017?
The following table shows CFC emissions (in million metric tons) from various sectors for an industry for a period of 5 years. Based on the table answer the question given below. Sector Year Cement Fertilizer Foam Pesticides 2015 200 500 80 100 2016 300 600 90 110 2017 320 650 100 120 2018 400 700 150 150 2019 450 800 200 180 The contribution of CFC emission from the fertilizer sector, in comparison to the total CFC emissions from all the sectors, was the least in which year?
Consider the following statements regarding depletion of the ozone layer: 1. Excessive release of chlorine and bromine in the environment from man-made compounds, such as chlorofluorocarbons. 2. Occurrence of certain natural phenomena such as sunspots, and stratospheric winds. 3. Degradation of materials by ultra-violet radiation 4. Major volcanic eruptions. Which of the above can be categorized as causing ozone depletion?
Consider the following statements  1. Montreal Protocol was signed in 1987 for Ozone layer depletion protection. 2.World Ozone day is celebrated on 22nd March. 3.Ozone is a Greenhouse gas responsible for Global Warming. Which of the statements given above is/are correct?