Gases that contribute to the greenhouse effect include: 1  Water vapor. 2  Carbon dioxide (CO 2). 3  Methane. 4  Nitrous oxide. 5  Chlorofluorocarbons (CFCs).
You can start maternity leave any time from 11 weeks before the beginning of the week your baby's due. You can bring the date forward if you need to take time off work for pregnancy-related reasons within four weeks of the expected birth date. Your employer may make you start your leave from then.
If thatâs the case, you have the right to 26 weeks of Ordinary Maternity Leave and 26 weeks of Additional Maternity Leave, making one year in total. The combined 52 weeks is known as Statutory Maternity Leave (SML).ou should tell your employer you want to take SML at least 15 weeks before the beginning of the week your baby is due. So long as you have given the correct notice, you are entitled to this no matter: 1  How long you have been with your employer. 2  How many hours you work.