The term antipollution is identified in base64 scheme by the sequence YW50aXBvbGx1dGlvbg==, while the MD5 signature is equal to 4f5ee489f5d6d5bc791f4a94e3b0ca10. The ASCII encoding of antipollution in hexadecimal notation is 616e7469706f6c6c7574696f6e.