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Countries of the world rely heavily on petroleum, coal and natural gas for their energy. sources. There are two major types of energy sources: renewable and non-renewable. Hydro-carbon or fossil fuels are non-renewable sources of energy. Reliance on them poses real big problems. Firstly, fossil fuels such as oil, coal, gas, etc, are finite energy resources and the world eventually will run out of them. Secondly, they will become too expensive in the coming decades and too damaging for the environment. Thirdly, fossil fuels have direct polluting impacts on earth's environment causing global warming. In contrast, renewable energy sources such as, wind and solar energy are constantly and naturally replenished and never run out.

Most renewable energy comes either directly or indirectly from the sun. Sunlight or solar energy can be used for heating and lighting homes, for generating electricity and for other commercial and industrial uses.

The sun's heat drives the wind and this wind energy can be captured with wind turbines to produce electricity. Then the wind and the sun's heat cause water to evaporate. When the water vapour turns into rain or snow and flows downhill into rivers or streams, its energy can be captured as hydroelectric energy.

Along with the rain and snow, sunlight causes plants to grow. Plants produce biomass which again can be turned into fuels such as fire wood, alcohol, etc that are called bioenergy. Scientists have identified hydrogen as another form of renewable energy source. It is the most abundant element in nature. But it does not exist separately as a gas. It is always combined with other elements, such as with oxygen to make water. Hydrogen, separated from another element, can be burned as a fuel to produce electricity.

Our Earth's interior contains molten lava which gives off extreme heat. This heat inside the Earth produces steam and hot water which can be used as geothermal energy to produce electricity for heating homes, etc.

Ocean energy comes from several sources. Ocean's force of tide and wave can be used to produce energy. The surface of the ocean gets more heat from the sun than the ocean depths. This temperature difference can be used as energy source too.

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Our Independence Day

26 March reminds us of the historic day in 1971 when Bangladesh declared its independence. It signifies the commencement of our nine-month-long Liberation War and the ultimate victory against oppression. The day is celebrated annually to commemorate the heroic struggle and immense sacrifices made by the people to achieve a sovereign nation.

26 March is observed as Bangladesh's Independence Day because on this day in 1971, the Father of the Nation, Bangabandhu Sheikh Mujibur Rahman, declared the independence of Bangladesh. This declaration ignited the Liberation War against Pakistan, leading to nine months of intense conflict. The day serves as a solemn reminder of the immense sacrifices made by millions of martyrs and freedom fighters who laid down their lives for the country's sovereignty. It is a day of national pride, remembrance, and renewal of the commitment to uphold the values for which the nation was founded.

The beginning of Independence Day celebrations.

The 31-gun salute is a ceremonial gesture that marks the official beginning of the Independence Day festivities in Bangladesh. It is a traditional military honor, serving as a symbol of respect and solemnity for the occasion. This salute commemorates the sacrifices made during the 1971 Liberation War and honors the birth of the nation. It sets a formal and respectful tone for the day's events, which include various cultural programs and tributes to the martyrs.

The cultural programmes held on Independence Day play a vital role in educating and inspiring the populace. They specifically highlight the arduous struggle and immense sacrifices made by the people of Bangladesh during the Liberation War of 1971. These events serve to remind everyone, especially the youth, about the historical context and the profound price paid to achieve the nation's independence, thereby reinforcing national pride and patriotism.

We pay homage to the martyrs by placing floral wreaths at the National Mausoleum at Savar and by participating in rallies and processions.

On Independence Day, it is a national tradition to pay tribute to the martyrs who sacrificed their lives for the country's freedom in 1971. This homage is primarily offered at the National Mausoleum in Savar, where the President, Prime Minister, other leaders, and people from all walks of life place floral wreaths. This act signifies the nation's profound respect and gratitude for their supreme sacrifice. Additionally, various rallies and processions are organized throughout the day, reinforcing the remembrance and celebration of their heroic struggle.

From this passage, we become inspired by the profound significance of Independence Day as a commemoration of the heroic struggle and immense sacrifices made in 1971 to achieve our nation's freedom. The description of nationwide celebrations with great enthusiasm, the respectful homage paid to martyrs at the National Mausoleum, and the various cultural programs highlighting the historical struggle and sacrifice, all instill a deep sense of patriotism and gratitude towards those who fought for independence. This reminds us of the importance of unity and determination in safeguarding our hard-earned sovereignty.