Salma Fadhilah

Nowadays, the most visited places for tourism are located in the city and urban area. Most of them are manmade recreation like amusement park or shopping district. The natural recreational places are not much visited and famous in tourism. Some of the natural resource based tourism that is still has many visitors are just places like beach or mountain, but the visitor still not as much as the other urban recreational places.

Satu setengah tahun lalu, siapa sangka masker yang terkadang dipakai untuk sekadar menyembunyikan muka jelek tidur di kereta atau pesawat, akhirnya harus dipakai setiap hari? Juga siapa sangka lift kantor yang biasanya diisi sampai berdesakan jika sudah mendekati waktu terlambat, kini hanya boleh diisi lima atau enam orang saja? Atau siapa sangka sekedar bisa makan di kantin sambil bercerita dan tertawa terbahak-bahak bisa jadi sesuatu yang sangat dirindukan, disaat kini makanan hanya bisa di-takeout dan dinikmati sendiri di meja masing-masing dengan senyap? 

Allelopathy is a biological phenomenon by which an organism produces one or more biochemicals that influence the germination, growth, survival, and reproduction of other organisms. These biochemicals are known as allelochemicals and can have beneficial (positive allelopathy) or detrimental (negative allelopathy) effects on the target organisms and the community. Allelochemicals are a subset of secondary metabolites,[1] which are not required for metabolism (i.e. growth, development and reproduction) of the allelopathic organism. Allelochemicals with negative allelopathic effects are an important part of plant defense against herbivory. [ Wikipedia ] Some of allelophatic plants in Indonesia which is very interesting and famous are: